VOLCANOES AROUND THE WORLD
Interesting Facts
Volcanic terrain is the result of the accumulation of erupted lava, unlike mountains that are the result of erosion of earth’s crust, uplifting, folding, and faulting. A vent that connects the molten areas or molten rock(magma) are formed through a series of cracks beneath and within the volcano. Approximately there are 956 potentially active volcanos world wide. link
About the Plot
The bubbles are showing the total number of volcanos in those regions
The color scheme is showing the different types of volcanos
The popups show the name of the volcano and when it last erupted
MAJOR ERUPTIONS SINCE 1700
Interesting Facts
There are about 954 active volcanoes in the world.
These volcanoes are distributed across the globe with Asia having the highest number with 298 and Oceania having the lowest number with 84.
The Volcanic Explosivity Index (VEI) is a scale that describes the size of explosive volcanic eruptions based on magnitude and intensity ranging from 1 (lowest) to 6 (highest).
There are also different types of volcanoes as listed: Shield(s), Stratovolcano, Stratovolcano(es), Caldera, Submarine, Shield, Volcanic field, Fissure vent(s), Compound, Complex, Pyroclastic shield, Pyroclastic cone(s), Pyroclastic cone, Caldera(s), Lava dome(s), Lava cone, Crater rows, Maar(s), Tuff cone(s), Complex(es), Subglacial, Lava dome, Lava cone(s), Tuff cone, Lava cone(es), Stratovolcano?.
About Plot
- This plot shows major eruptions (VEI and year of eruption) from around the world since the 1700’s while showing the continental location and country of each volcano. The plot also shows the population within 100,000 km of the volcano telling you the number of people that may be affected if any of these volcanoes erupt and the volcano type.
VOLCANOES IN USA
Interesting Facts
The highest elevation volcano is in Washington named Mt. Rainier elevation 4392m
The lowest elevation if a volcano is in California named Salton Buttes elevation -40m
Fun fact about volcano’s in the USA is that they are all on the western side of the continent. The last volcano in this data set to errupt was Semisopochnoi in 2020 in Alaska, its elevation is 1221m.
About Plot
The volcanos are maped by elevation using a function called map-data with points plotted as sf points. scale_fill_viridis was used to create the color with the theme of magma because of volcanos.
the elevations of the top 5 regions was created with geom_density_ridges_gradient which creates histogram like distributions of the volcano heights. The colorscheme was set to match with the points on the map.
TIME SERIES PLOT
Interesting Facts
Japan is located on the “Ring of Fire” which is a chain of volcanoes that stretches 40,000 kilometers. There are over 111 active volcanoes in Japan. The majority of mountains in Japan were formed as volcanoes.
About the Plot
Each triangle represents an eruption
The height of each triangle represents the volcanic explosion index
Each color represents the subregion the eruption occured in